---
layout: "default"
title: "Operator: *="
description: "Swift documentation for the '*=' operator."
root: "/v2.1"
---

<code class="language-swift">infix operator *= {
    associativity right
    precedence 90
    assignment
}</code>

<h3>Declarations</h3>

<div class="declaration" id="func-stareq-inout_-double-rhs_-double">
<a class="toggle-link" data-toggle="collapse" href="#comment-func-stareq-inout_-double-rhs_-double">func *=(<wbr>inout:<wbr> Double, rhs: Double)</a>
        
<div class="comment collapse" id="comment-func-stareq-inout_-double-rhs_-double"><div class="p">
    

    <h4>Declaration</h4>    
    <code class="language-swift">func *=(inout lhs: Double, rhs: Double)</code>
    
    
</div></div>
</div>
<div class="declaration" id="func-stareq-inout_-float-rhs_-float">
<a class="toggle-link" data-toggle="collapse" href="#comment-func-stareq-inout_-float-rhs_-float">func *=(<wbr>inout:<wbr> Float, rhs: Float)</a>
        
<div class="comment collapse" id="comment-func-stareq-inout_-float-rhs_-float"><div class="p">
    

    <h4>Declaration</h4>    
    <code class="language-swift">func *=(inout lhs: Float, rhs: Float)</code>
    
    
</div></div>
</div>
<div class="declaration" id="func-stareq-inout_-float80-rhs_-float80">
<a class="toggle-link" data-toggle="collapse" href="#comment-func-stareq-inout_-float80-rhs_-float80">func *=(<wbr>inout:<wbr> Float80, rhs: Float80)</a>
        
<div class="comment collapse" id="comment-func-stareq-inout_-float80-rhs_-float80"><div class="p">
    

    <h4>Declaration</h4>    
    <code class="language-swift">func *=(inout lhs: Float80, rhs: Float80)</code>
    
    
</div></div>
</div>
<div class="declaration" id="func-stareq-inout_-int-rhs_-int">
<a class="toggle-link" data-toggle="collapse" href="#comment-func-stareq-inout_-int-rhs_-int">func *=(<wbr>inout:<wbr> Int, rhs: Int)</a>
        
<div class="comment collapse" id="comment-func-stareq-inout_-int-rhs_-int"><div class="p">
    

    <h4>Declaration</h4>    
    <code class="language-swift">func *=(inout lhs: Int, rhs: Int)</code>
    
    
</div></div>
</div>
<div class="declaration" id="func-stareq-inout_-int8-rhs_-int8">
<a class="toggle-link" data-toggle="collapse" href="#comment-func-stareq-inout_-int8-rhs_-int8">func *=(<wbr>inout:<wbr> Int8, rhs: Int8)</a>
        
<div class="comment collapse" id="comment-func-stareq-inout_-int8-rhs_-int8"><div class="p">
    

    <h4>Declaration</h4>    
    <code class="language-swift">func *=(inout lhs: Int8, rhs: Int8)</code>
    
    
</div></div>
</div>
<div class="declaration" id="func-stareq-inout_-int16-rhs_-int16">
<a class="toggle-link" data-toggle="collapse" href="#comment-func-stareq-inout_-int16-rhs_-int16">func *=(<wbr>inout:<wbr> Int16, rhs: Int16)</a>
        
<div class="comment collapse" id="comment-func-stareq-inout_-int16-rhs_-int16"><div class="p">
    

    <h4>Declaration</h4>    
    <code class="language-swift">func *=(inout lhs: Int16, rhs: Int16)</code>
    
    
</div></div>
</div>
<div class="declaration" id="func-stareq-inout_-int32-rhs_-int32">
<a class="toggle-link" data-toggle="collapse" href="#comment-func-stareq-inout_-int32-rhs_-int32">func *=(<wbr>inout:<wbr> Int32, rhs: Int32)</a>
        
<div class="comment collapse" id="comment-func-stareq-inout_-int32-rhs_-int32"><div class="p">
    

    <h4>Declaration</h4>    
    <code class="language-swift">func *=(inout lhs: Int32, rhs: Int32)</code>
    
    
</div></div>
</div>
<div class="declaration" id="func-stareq-inout_-int64-rhs_-int64">
<a class="toggle-link" data-toggle="collapse" href="#comment-func-stareq-inout_-int64-rhs_-int64">func *=(<wbr>inout:<wbr> Int64, rhs: Int64)</a>
        
<div class="comment collapse" id="comment-func-stareq-inout_-int64-rhs_-int64"><div class="p">
    

    <h4>Declaration</h4>    
    <code class="language-swift">func *=(inout lhs: Int64, rhs: Int64)</code>
    
    
</div></div>
</div>
<div class="declaration" id="func-stareq-inout_-uint-rhs_-uint">
<a class="toggle-link" data-toggle="collapse" href="#comment-func-stareq-inout_-uint-rhs_-uint">func *=(<wbr>inout:<wbr> UInt, rhs: UInt)</a>
        
<div class="comment collapse" id="comment-func-stareq-inout_-uint-rhs_-uint"><div class="p">
    

    <h4>Declaration</h4>    
    <code class="language-swift">func *=(inout lhs: UInt, rhs: UInt)</code>
    
    
</div></div>
</div>
<div class="declaration" id="func-stareq-inout_-uint8-rhs_-uint8">
<a class="toggle-link" data-toggle="collapse" href="#comment-func-stareq-inout_-uint8-rhs_-uint8">func *=(<wbr>inout:<wbr> UInt8, rhs: UInt8)</a>
        
<div class="comment collapse" id="comment-func-stareq-inout_-uint8-rhs_-uint8"><div class="p">
    

    <h4>Declaration</h4>    
    <code class="language-swift">func *=(inout lhs: UInt8, rhs: UInt8)</code>
    
    
</div></div>
</div>
<div class="declaration" id="func-stareq-inout_-uint16-rhs_-uint16">
<a class="toggle-link" data-toggle="collapse" href="#comment-func-stareq-inout_-uint16-rhs_-uint16">func *=(<wbr>inout:<wbr> UInt16, rhs: UInt16)</a>
        
<div class="comment collapse" id="comment-func-stareq-inout_-uint16-rhs_-uint16"><div class="p">
    

    <h4>Declaration</h4>    
    <code class="language-swift">func *=(inout lhs: UInt16, rhs: UInt16)</code>
    
    
</div></div>
</div>
<div class="declaration" id="func-stareq-inout_-uint32-rhs_-uint32">
<a class="toggle-link" data-toggle="collapse" href="#comment-func-stareq-inout_-uint32-rhs_-uint32">func *=(<wbr>inout:<wbr> UInt32, rhs: UInt32)</a>
        
<div class="comment collapse" id="comment-func-stareq-inout_-uint32-rhs_-uint32"><div class="p">
    

    <h4>Declaration</h4>    
    <code class="language-swift">func *=(inout lhs: UInt32, rhs: UInt32)</code>
    
    
</div></div>
</div>
<div class="declaration" id="func-stareq-inout_-uint64-rhs_-uint64">
<a class="toggle-link" data-toggle="collapse" href="#comment-func-stareq-inout_-uint64-rhs_-uint64">func *=(<wbr>inout:<wbr> UInt64, rhs: UInt64)</a>
        
<div class="comment collapse" id="comment-func-stareq-inout_-uint64-rhs_-uint64"><div class="p">
    

    <h4>Declaration</h4>    
    <code class="language-swift">func *=(inout lhs: UInt64, rhs: UInt64)</code>
    
    
</div></div>
</div>
<div class="declaration" id="func-stareq-t_-integerarithmetictype-inout_-t-rhs_-t">
<a class="toggle-link" data-toggle="collapse" href="#comment-func-stareq-t_-integerarithmetictype-inout_-t-rhs_-t">func <wbr>*= &lt;T : _IntegerArithmeticType&gt;(<wbr>inout:<wbr> T, rhs: T)</a>
        
<div class="comment collapse" id="comment-func-stareq-t_-integerarithmetictype-inout_-t-rhs_-t"><div class="p">
    <p>multiply <code>lhs</code> and <code>rhs</code> and store the result in <code>lhs</code>, trapping in
case of arithmetic overflow (except in -Ounchecked builds).</p>

    <h4>Declaration</h4>    
    <code class="language-swift">func *=&lt;T : _IntegerArithmeticType&gt;(inout lhs: T, rhs: T)</code>
    
    
</div></div>
</div>
